Porous granular hygroscopic material.



E. N.TRUMP & J. 1). PENNOGK.

POROUS GRANULAR HYGBOSGOPIG MATERIAL.

APPLICATION FILED MAR. 16, 1910. 1,026,724. Patented May 21, 1912.

f D? c gnaw vvfow 66 M H. W 5mm; anion 1 e1 UNITED srarus Parana orrroaEDWARD N. TRUMP, OF SYRACUSE, AND JOHN D. PENNOCK, OF SOLVAY, NEW YORK,

ASSIGNORS TO THE SOLVAY PROCESS COMPANY, OF SYRACUSE, NEW YORK, A

CORPORATION OF NEW YORK.

ronoos GBANULAR nreaosoorrc MATERIAL Specification of Letters Patent.

Application filed March 18, 1910. Serial No. 550,236.

To all whom 'it may concern:

Be it known that we, EDWARD N. TRUMP, residing at Syracuse, and JOHN D.PEN- NOCK, residing at Solvay, in the county of Onondaga and State ofNew York, both citizens of the United States, have invented a PorousGranular Hygroscopic Material,

of which the following is a specification.

7 Our invention relates generally to those hygroscopic metalliccompounds which are obtained in solid form by cooling so as to solidifya molten mass thereof or crystallize the compounds outof a solutionthereof, though in practice we have more particularly applied it tocalcium chlorid and caustic soda, in connection with which it has someparticular advantages.

Heretofore in the production of compound of this class it has been thepractice after having produced, in whatever way, a solution thereof, andbrought the same to a high degree of saturation, to permit such solutionto. gradually cool, whereupon the material crystallizes or solidifiesout of the solution. In this manner there is produced 'a solid mass, oras it is called, a drum .of the salt or other compound, in which shapesuch salts are sold in large quantities. In this shape the material, ifto be used in solution, is dissolved slowly from the mass,

or otherwise is ground or pulverized beforeentering into solution, asare also compounds of this class, such as caustic soda, when sold in thedry state in small quantities, as for domestic use.

The object of our improvements is to produce such compounds in the firstinstance in such forIIPthatno subsequent pulverization will be requiredto adapt them for use, and to make them more readily soluble thanheretofore. centrated solution of the salt or other compound to beproduced, which may be made .in any usual or well known way, at thepoint where it is ready to be set aside to coolso as to permit thecompound to solidify, and instead of gradually cooling'the solution, asheretofore, we subject it to the action of a blast of air. The solutionby the action of the air blast is blown into drops, or par- To this endwe take the conhave illustrated a form of apparatuswhich mayconveniently be employed for carrying our invention into effect.

Figure 1 of the drawings shows a vertical section of the apparatus, andFig. 2 an elevation of the air blast nozzle.

Referring to the drawings, A, indicates a pot or tank in which thesaturated solution of the material to be produced is contained, and fromwhich a trough, B, leads into a PatentedMay21, 1912; f

granulating chamber, C, provided with an air outlet, D.

E indicates an air compressor from which a pipe, F, leads to a flat airnozzle, G, extending across the end of the trough B.

The solution is discharged from the pot, A, into the trough, B, in anyconvenient manner, as by being dipped up in buckets and emptied intothev trough, and flows through the trough to the discharge end thereofwithin the chamber, C; As the solution reaches the discharge end of thetrough it is met by a blast of air from compressor, E, and blown intospray or drops which are quickly cooled. Immediately upon the cooling,of the solution the contained salt or other compound solidifies andfalls to the bottom of the granulating 'chamber,'C, in the shape ofsmall, irregularlyshaped, rounded granules. The granules thus formed arenot only of convenient size for immediate use for the purpose to whichsuch compounds are applied, without any subsequent grinding or crushing,but the granules are of a more porous structure, and hence the materialabsorbs moisture more readily and enters more readily into soluderstood.

What we claim as new and desire to secure by Letters Patent is:

A soluble, hygroscopic, solid compound of a metal in the form of small,rounded, po-

10 rous granules, formed by the rapid solidification of the compound.from its liquid form.

In testimony whereof, we have hereunto subscribed our names this 28thday of Feb ruary, A. 1)., 1910.

. EDWARD N. TRUMP.

JOHN D. PENNOCK.

Witnesses:

HARRY/E. CLARKE, HAROLD O. VAN DENBURGH.

